TLDR: ink doesn’t bleed, lightweight, colors are pretty, writes smoothly, lasts a long timeThese are my absolute favorite pens ever. I used one pack for an entire school year as a teacher and they didn’t run out. I love the little silver ball embedded in the clip because it’s like a little fidget toy. I’ve started collecting them after I use all the ink in the pens. :)) They are very smooth to write with and the ink is very dark. I would say the ink is more liquid than gel (at least that’s how it feels, but I’m no expert). All I know is I love pens and these are at the top of my list. All my teacher friends love them, too! I have used the pens on blank copy paper to make photo copies of my own worksheets and the ink was dark enough to make the copies really solid. For anyone who is curious, I’ve used the pens on graph paper, which is really thin, and the ink still did not bleed. I would say they are very good for journaling since they last for practically forever and the ink just does not bleed whatsoever. :))